A Tale of Two Image Formats (Patreon)

(TL;DR below)

When I first started on patreon, my usual format of choice was to post high bitrate JPG images. The quality is fairly good at 70%, nearly lossless at 90%, so most of the things I posted were within the 85-95% quality range. That was fine, until...

Basically, patreon intercepts jpeg images and re-compresses them. No matter what I upload, I always get an approximately identical file size and quality. It takes my already compressed JPG, slightly sharpens, then compresses again. This only showed up around 2 years ago if memory serves me.

Naturally, the solution would be to upload PNG instead of JPG, and that's exactly what I've done ever since. There are only a few problems with this... The first being that files tend to be nearly 5 times as large, depending on the image's contents. For a 5K resolution desktop wallpaper, that's something like 19-20MB. Compare that to under 5MB for a high quality JPG. The second problem is that windows can't seem to set wallpapers from PNGs that are this large.

The Solution

How do I solve this problem? After doing some tests, I've concluded that the file (post-processed) is around the equivalent of save for web at 90%. If I save at 100%, I get a file twice the size of the target quality, but with no artifacts whatsoever. The resulting image is nearly flawless, and is just as good as my own 90% save for web.

TL;DR

I'm going to be scanning through my submissions and including a JPG version of files in addition to the PNGs I'm already posting. It'll take some weeks or even months to achieve during my free time, but it seems necessary.